55689385 has 4 divisors (see below), whose sum is σ = 66827268. Its totient is φ = 44551504.

The previous prime is 55689341. The next prime is 55689421. The reversal of 55689385 is 58398655.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36144144 + 19545241 = 6012^2 + 4421^2 .

It is a cyclic number.

It is not a de Polignac number, because 55689385 - 2¹³ = 55681193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5568934 + ... + 5568943.

It is an arithmetic number, because the mean of its divisors is an integer number (16706817).

Almost surely, 2^55689385 is an apocalyptic number.

It is an amenable number.

55689385 is a deficient number, since it is larger than the sum of its proper divisors (11137883).

55689385 is a wasteful number, since it uses less digits than its factorization.

55689385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11137882.

The product of its digits is 1296000, while the sum is 49.

The square root of 55689385 is about 7462.5320769830. The cubic root of 55689385 is about 381.8775614290.

The spelling of 55689385 in words is "fifty-five million, six hundred eighty-nine thousand, three hundred eighty-five".